/**
 * MenuItem.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

import Widget from './Widget';
import Factory from 'tinymce/core/api/ui/Factory';
import Env from 'tinymce/core/api/Env';
import Delay from 'tinymce/core/api/util/Delay';

/**
 * Creates a new menu item.
 *
 * @-x-less MenuItem.less
 * @class tinymce.ui.MenuItem
 * @extends tinymce.ui.Control
 */

const toggleTextStyle = function (ctrl, state) {
  const textStyle = ctrl._textStyle;
  if (textStyle) {
    const textElm = ctrl.getEl('text');
    textElm.setAttribute('style', textStyle);

    if (state) {
      textElm.style.color = '';
      textElm.style.backgroundColor = '';
    }
  }
};

export default Widget.extend({
  Defaults: {
    border: 0,
    role: 'menuitem'
  },

  /**
   * Constructs a instance with the specified settings.
   *
   * @constructor
   * @param {Object} settings Name/value object with settings.
   * @setting {Boolean} selectable Selectable menu.
   * @setting {Array} menu Submenu array with items.
   * @setting {String} shortcut Shortcut to display for menu item. Example: Ctrl+X
   */
  init (settings) {
    const self = this;
    let text;

    self._super(settings);

    settings = self.settings;

    self.classes.add('menu-item');

    if (settings.menu) {
      self.classes.add('menu-item-expand');
    }

    if (settings.preview) {
      self.classes.add('menu-item-preview');
    }

    text = self.state.get('text');
    if (text === '-' || text === '|') {
      self.classes.add('menu-item-sep');
      self.aria('role', 'separator');
      self.state.set('text', '-');
    }

    if (settings.selectable) {
      self.aria('role', 'menuitemcheckbox');
      self.classes.add('menu-item-checkbox');
      settings.icon = 'selected';
    }

    if (!settings.preview && !settings.selectable) {
      self.classes.add('menu-item-normal');
    }

    self.on('mousedown', function (e) {
      e.preventDefault();
    });

    if (settings.menu && !settings.ariaHideMenu) {
      self.aria('haspopup', true);
    }
  },

  /**
   * Returns true/false if the menuitem has sub menu.
   *
   * @method hasMenus
   * @return {Boolean} True/false state if it has submenu.
   */
  hasMenus () {
    return !!this.settings.menu;
  },

  /**
   * Shows the menu for the menu item.
   *
   * @method showMenu
   */
  showMenu () {
    const self = this;
    const settings = self.settings;
    let menu;
    const parent = self.parent();

    parent.items().each(function (ctrl) {
      if (ctrl !== self) {
        ctrl.hideMenu();
      }
    });

    if (settings.menu) {
      menu = self.menu;

      if (!menu) {
        menu = settings.menu;

        // Is menu array then auto constuct menu control
        if (menu.length) {
          menu = {
            type: 'menu',
            items: menu
          };
        } else {
          menu.type = menu.type || 'menu';
        }

        if (parent.settings.itemDefaults) {
          menu.itemDefaults = parent.settings.itemDefaults;
        }

        menu = self.menu = Factory.create(menu).parent(self).renderTo();
        menu.reflow();
        menu.on('cancel', function (e) {
          e.stopPropagation();
          self.focus();
          menu.hide();
        });
        menu.on('show hide', function (e) {
          if (e.control.items) {
            e.control.items().each(function (ctrl) {
              ctrl.active(ctrl.settings.selected);
            });
          }
        }).fire('show');

        menu.on('hide', function (e) {
          if (e.control === menu) {
            self.classes.remove('selected');
          }
        });

        menu.submenu = true;
      } else {
        menu.show();
      }

      menu._parentMenu = parent;

      menu.classes.add('menu-sub');

      let rel = menu.testMoveRel(
        self.getEl(),
        self.isRtl() ? ['tl-tr', 'bl-br', 'tr-tl', 'br-bl'] : ['tr-tl', 'br-bl', 'tl-tr', 'bl-br']
      );

      menu.moveRel(self.getEl(), rel);
      menu.rel = rel;

      rel = 'menu-sub-' + rel;
      menu.classes.remove(menu._lastRel).add(rel);
      menu._lastRel = rel;

      self.classes.add('selected');
      self.aria('expanded', true);
    }
  },

  /**
   * Hides the menu for the menu item.
   *
   * @method hideMenu
   */
  hideMenu () {
    const self = this;

    if (self.menu) {
      self.menu.items().each(function (item) {
        if (item.hideMenu) {
          item.hideMenu();
        }
      });

      self.menu.hide();
      self.aria('expanded', false);
    }

    return self;
  },

  /**
   * Renders the control as a HTML string.
   *
   * @method renderHtml
   * @return {String} HTML representing the control.
   */
  renderHtml () {
    const self = this;
    const id = self._id;
    const settings = self.settings;
    const prefix = self.classPrefix;
    let text = self.state.get('text');
    let icon = self.settings.icon, image = '', shortcut = settings.shortcut;
    let url = self.encode(settings.url), iconHtml = '';

    // Converts shortcut format to Mac/PC variants
    function convertShortcut(shortcut) {
      let i, value, replace = {};

      if (Env.mac) {
        replace = {
          alt: '&#x2325;',
          ctrl: '&#x2318;',
          shift: '&#x21E7;',
          meta: '&#x2318;'
        };
      } else {
        replace = {
          meta: 'Ctrl'
        };
      }

      shortcut = shortcut.split('+');

      for (i = 0; i < shortcut.length; i++) {
        value = replace[shortcut[i].toLowerCase()];

        if (value) {
          shortcut[i] = value;
        }
      }

      return shortcut.join('+');
    }

    function escapeRegExp(str) {
      return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
    }

    function markMatches(text) {
      const match = settings.match || '';

      return match ? text.replace(new RegExp(escapeRegExp(match), 'gi'), function (match) {
        return '!mce~match[' + match + ']mce~match!';
      }) : text;
    }

    function boldMatches(text) {
      return text.
        replace(new RegExp(escapeRegExp('!mce~match['), 'g'), '<b>').
        replace(new RegExp(escapeRegExp(']mce~match!'), 'g'), '</b>');
    }

    if (icon) {
      self.parent().classes.add('menu-has-icons');
    }

    if (settings.image) {
      image = ' style="background-image: url(\'' + settings.image + '\')"';
    }

    if (shortcut) {
      shortcut = convertShortcut(shortcut);
    }

    icon = prefix + 'ico ' + prefix + 'i-' + (self.settings.icon || 'none');
    iconHtml = (text !== '-' ? '<i class="' + icon + '"' + image + '></i>\u00a0' : '');

    text = boldMatches(self.encode(markMatches(text)));
    url = boldMatches(self.encode(markMatches(url)));

    return (
      '<div id="' + id + '" class="' + self.classes + '" tabindex="-1">' +
      iconHtml +
      (text !== '-' ? '<span id="' + id + '-text" class="' + prefix + 'text">' + text + '</span>' : '') +
      (shortcut ? '<div id="' + id + '-shortcut" class="' + prefix + 'menu-shortcut">' + shortcut + '</div>' : '') +
      (settings.menu ? '<div class="' + prefix + 'caret"></div>' : '') +
      (url ? '<div class="' + prefix + 'menu-item-link">' + url + '</div>' : '') +
      '</div>'
    );
  },

  /**
   * Gets invoked after the control has been rendered.
   *
   * @method postRender
   */
  postRender () {
    const self = this, settings = self.settings;

    let textStyle = settings.textStyle;
    if (typeof textStyle === 'function') {
      textStyle = textStyle.call(this);
    }

    if (textStyle) {
      const textElm = self.getEl('text');
      if (textElm) {
        textElm.setAttribute('style', textStyle);
        self._textStyle = textStyle;
      }
    }

    self.on('mouseenter click', function (e) {
      if (e.control === self) {
        if (!settings.menu && e.type === 'click') {
          self.fire('select');

          // Edge will crash if you stress it see #2660
          Delay.requestAnimationFrame(function () {
            self.parent().hideAll();
          });
        } else {
          self.showMenu();

          if (e.aria) {
            self.menu.focus(true);
          }
        }
      }
    });

    self._super();

    return self;
  },

  hover () {
    const self = this;

    self.parent().items().each(function (ctrl) {
      ctrl.classes.remove('selected');
    });

    self.classes.toggle('selected', true);

    return self;
  },

  active (state) {
    toggleTextStyle(this, state);

    if (typeof state !== 'undefined') {
      this.aria('checked', state);
    }

    return this._super(state);
  },

  /**
   * Removes the control and it's menus.
   *
   * @method remove
   */
  remove () {
    this._super();

    if (this.menu) {
      this.menu.remove();
    }
  }
});